Description

The Bently Nevada 330780-91-05 is a 3300 XL 11mm Proximitor Sensor, serving as the critical signal conditioning component of the 3300 XL 11mm Proximity Transducer System. Engineered for machinery condition monitoring, this sensor provides a 3.94 V/mm (100 mV/mil) output for precise non-contacting vibration and displacement measurements. The 11mm tip design offers an extended linear range compared to standard 8mm systems, making it ideal for monitoring fluid film bearing machines, axial (thrust) position, differential expansion on steam turbines, and reciprocating compressor rod position.

Features

• Extended Linear Range: Optimized for applications requiring greater measurement range than standard 8mm probes.
• SpringLoc Terminals: Facilitates rapid, robust field wiring without the need for specialized installation tools.
• Enhanced RFI/EMI Immunity: Complies with CE mark requirements without special mounting considerations and resists interference from nearby high-frequency radio signals.
• Versatile Mounting: Thin-profile design supports both high-density DIN-rail and traditional panel-mount configurations.
• System Compatibility: Designed for seamless integration with 3300 and 3500 series monitoring systems (requires updated configuration software).

Applications

• Power Generation: Monitoring cooling tower fans, steam turbine differential expansion, and phase reference (Keyphasor) signals.
• Petrochemical & Refining: Critical monitoring for fin-fans and hazardous area applications.
• Chemical Manufacturing: Vibration monitoring for agitators, mixers, and reactor cooling systems.
• Mining & Heavy Industry: Ventilation fan monitoring and processing machinery protection.

Technical Specifications

Installation Guidelines

• Handling: Use an anti-static grounding strap when handling the module to prevent ESD damage to internal circuitry.
• System Matching: Ensure the total system length (probe + extension cable + Proximitor) matches the 9.0m calibration of this unit.
• Wiring: Utilize SpringLoc terminals for secure connections; ensure proper shielding for signal cables to maintain EMI immunity.
• Power Requirements: Verify supply voltage is within -17.5 Vdc to -26 Vdc range. If using barriers, ensure -23 Vdc to -26 Vdc.
• Upgrades: When replacing 7200-series systems, all components must be replaced with 3300 XL 11mm hardware and the monitoring system software must be updated accordingly.

FAQ

What is the 330780-91-05?

It is a 3300 XL 11mm Proximitor Sensor configured for a 9.0m system length, used for non-contact vibration and position measurement in industrial machinery.

What is the primary application of this sensor?

It is primarily used for axial (thrust) position measurements, radial vibration on fluid film bearings, and rod drop measurements on reciprocating compressors.

What is the required power supply?

The sensor requires a DC power supply between -17.5 Vdc and -26 Vdc, with a maximum current consumption of 12 mA.